brcm2708-gpu-fw: move pkg build dir to kernel build dir to fix rebuild bugs after cleaning the kernel tree

Signed-off-by: Felix Fietkau <[email protected]>

SVN-Revision: 48732

package/kernel/brcm2708-gpu-fw/Makefile

@@ -16,7 +16,7 @@ PKG_SOURCE:=$(PKG_REV).tar.gz
 PKG_SOURCE_URL:=https://github.com/Hexxeh/rpi-firmware/archive/
 PKG_MD5SUM:=66bbad77fdd9e5391d4130fa11d94646
 
-PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)/rpi-firmware-$(PKG_REV)
+PKG_BUILD_DIR:=$(KERNEL_BUILD_DIR)/$(PKG_NAME)/rpi-firmware-$(PKG_REV)
 
 include $(INCLUDE_DIR)/package.mk